This question runs in a pre-configured Salesforce environment - no personal connection required.

Find all accounts that have zero associated contacts. Return a list of account names sorted alphabetically. This tests understanding of relationship queries and subqueries in SOQL.

Examples:

Scenario: Org has accounts named 'Acme Corp', 'Beta LLC', 'Gamma Inc' 'Acme Corp' has 2 contacts, 'Beta LLC' has 0 contacts, 'Gamma Inc' has 0 contacts Output: ['Beta LLC', 'Gamma Inc'] Explanation: Only accounts with no contacts are returned, sorted alphabetically. Scenario: All accounts have at least one contact Output: [] Explanation: An empty list is returned when no accounts lack contacts. Scenario: No accounts exist in the org Output: [] Explanation: An empty list is returned when there are no accounts.
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